Josh has been named American Lawyer's “Litigator of the Year” twice, in addition to being a finalist for 2022 and 2025. In 2012, the magazine dubbed him “the Defibrillator” based on his streak of appellate wins for companies that “appeared to be at death’s door,” and in 2017 it declared, he “still deserves the moniker we once gave him.”
In 2014, The Financial Times named Josh one of the 10 most innovative lawyers in the North American legal sector for his work “demystify[ing] the technical issues” and securing a victory in the blockbuster Federal Circuit appeal, Oracle v. Google. Chambers USA has reported, “He wins accolades for his ‘brilliant analysis and judgment.’ Clients appreciate how he ‘rethinks every case from the ground up,’ and add: ‘He can take the most complicated legal or technological issue and present it in a way that seems like common sense.’” Another edition of Chambers USA added: “‘His briefs are quite simply beautiful,’” and “clients describe his courtroom presence as ‘both commanding and accessible at the same time.’ He has the ‘perfect combination of persuasiveness, intelligence, wit, and deference.’”
Josh's practice covers a wide range of subjects, including intellectual property, financial services, securities, privacy, antitrust, federal preemption, insurance law, corporate governance, criminal law, and constitutional litigation. Among his recent clients are Cisco, Credit Suisse, Cox Communications, DISH Network, Genentech, Gilead, Johnson & Johnson, JPMorgan Chase, Microsoft, Mozilla, Oracle, Sonos, and Royal Bank of Scotland.
Clients turn to Josh to win the highest stakes appeals, including appeals in cases that threaten the very survival of a business. For example:
He represented Microsoft in an international cause célèbre in the U.S. Supreme Court challenging the U.S. Government’s claim that it can serve warrants for emails stored overseas.
He represented DISH Network in one of the most high-profile patent appeals in the country, successfully overturning an injunction that threatened the company's life.
He has been lead counsel in multiple cases either defending or challenging verdicts over $1 billion.
He represented Facebook in the high-profile battle waged by the founder's Harvard classmates, the Winklevoss twins, who laid claim to the idea for Facebook, winning a ruling from the Ninth Circuit to end the lawsuit.
He won a landmark victory in a Supreme Court case that rescued the estimated $60 billion U.S. market of copyrighted goods manufactured abroad.
He represented 36 law schools in a high-profile Supreme Court case against the Department of Defense.
Josh was the founding president and CEO of the Brennan Center for Justice at New York University School of Law, one of the country’s foremost public interest firms. Over the course of eight years, he was the Brennan Center’s chief strategist on litigation and public policy advocacy. Before that, Josh founded the Office of the Appellate Defender, a public defender office specializing in criminal appeals.
Ari's experience includes supervising cases through all phases of litigation, from pre-litigation strategy through appeal. Most recently, Ari served as lead counsel to an aerospace defense company in litigation that began in New York State court and continued through a six-month trial in bankruptcy court in connection with a $1.3 billion restructuring transaction. His courtroom advocacy, briefing strategies, and fact and expert depositions have helped secure favorable outcomes to a number of clients involved in high-stakes disputes.
Before joining Orrick, Ari was an associate with Quinn Emanuel Urquhart & Sullivan LLP and served as a law clerk to Judge Richard M. Berman on the United States District Court for the Southern District of New York.
An accomplished litigator, Aaron advises leading investment banks, financial institutions, mortgage servicers, non-bank lenders, and alternative asset managers on the unique issues impacting the finance sector, from major commercial disputes to securities litigation and enforcement actions. Leveraging his dispute resolution expereince, Aaron serves as a trusted partner to clients, advising on best practices for mitigating risk long before there is the threat of litigation.
In 2018, Aaron moved to the firm’s Orange County office from New York. The move served his New York-based traditional financial institution clients needing counsel on the West Coast, while also expanding his practice.
Legal 500 touts Paul as a recommended attorney for Securities Litigation, observing that he is “among the most creative and strategic lawyers” who always has “an eye on the end game.” Paul achieved American Lawyer Litigator of the Week recognition as part of a team that achieved a ground-breaking New York Court of Appeals victory that substantially reduced financial exposure in RMBS repurchase litigation.
Leader of Orrick's Securities Litigation practice and deputy leader of the Firm's Financial Services Litigation practice, Paul has extensive experience representing clients in securities class actions, shareholder derivative lawsuits, commercial contractual disputes and other complex litigation matters at both the trial and appellate levels, as well as in connection with internal, government and regulatory investigations. Paul also counsels domestic and foreign accounting firms on matters related to state CPA licensing and state board regulation.
As a seasoned IP litigator and counselor, Diana’s practice has run the gamut from high stakes trials, to take-down and anti-counterfeiting campaigns, to employee departure and trade secret investigations. She represents clients in District and state courts and before administrative bodies including the ITC and the USPTO. For example, Diana tried and won a complex case in which the other side sought to extend the monopoly of an expired utility patent by claiming trade dress rights in a technical product feature. Drawing upon experience handling both complex patent and trademark matters, her team successfully argued that the intersection of patent and trademark policy prevented the other side from continuing its monopoly, clearing the way for her client to enter the market. With Diana at their side, companies can rest assured that their essential assets are protected, from their core technologies, to assets including their company name, logo, and website.
While at Orrick, Diana was seconded to the City and County of San Francisco, where she had the privilege to serve as an Assistant District Attorney, and first-chair several trials. She was also seconded to Salesforce, where she learned first-hand that the law comprises just one component of a company’s overall business strategy.
Diana is also passionate about her pro bono work. For example, she represented two detainees in Guantanamo in connection with their petitions for a writ of habeas corpus, and she is currently working with the Lawyers’ Committee for Civil Rights of the San Francisco Bay Area. Before joining the firm, Diana worked for the Legal Aid of Cambodia where she assisted with the prosecution of former Khmer Rouge officials and represented individuals who sought to reclaim land rights.
Diana is a member of the International Trademark Association, of ChIPs: Advancing Women in IP and of the Harvard Club of San Francisco.
As a Partner in the Milan office and Head of the Italian Employment practice, Mario is member of the Employment International Group and focuses on all aspects of employment, agency, and self-employment relationships, advising clients in both litigation and out-of-court matters, including the assistance on his field in transactional deals.
Mario regularly assists clients with the negotiation of both employment and self-employment agreements, throughout the performance of such relationships and at their termination, with the aim of providing high-quality services grounded in rigorous analysis and close client interaction.
His clients operate in the tourism, services, finance, credit, chemical, tech, infrastructure and public administration sectors (including state-owned companies).
Mario has also developed considerable experience in managing companies’ relationships with their board members, as well as in disputes involving social security institutions.
He is the author of numerous articles on labor law published in professional journals.
Mario is admitted to the Milan Bar and is also a member of AGI – Italian Employment Lawyers Association – and of the Italian Journalists Association.
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